110 



SKETCH or THE HISTORY OF MAMMALIA. 



very wide, overplumbing- the temporal fossae, of* which 

 the depth and width indicate the enormous levator mus- 

 cles of the lower jaw, not only for the purpose of mas- 

 tication, but for the particular action of the lower jaw, 

 with its rake-like tusks. Moreover, in the lower jaw 

 we find an analogy to that of the dugong, of which the 

 branches curve downwards for a third of their length to 

 a deflected symphysis, only that in the dinotherium 

 this downward curvature is carried to a far greater ex- 

 treme, for the implantation of tusk-incisors. What were 

 the limbs of this gigantic animal ? If its habits were 

 terrestrial, which a consideration of the skull forbids us 

 to believe, the dinotherium must have had solid pillars 

 of support, like the limbs of the elephant, and destitute 

 of that liberty which even in the Pangolins they are 

 endowed with ; but if our ideas are correct, its limbs 



>#T^^^^^--. 



69 . — Dinotherium. 



